| |
| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrStencilBuffer.h" |
| |
| #include "GrContext.h" |
| #include "GrGpu.h" |
| #include "GrResourceCache.h" |
| |
| void GrStencilBuffer::transferToCache() { |
| SkASSERT(NULL == this->getCacheEntry()); |
| |
| this->getGpu()->getContext()->addStencilBuffer(this); |
| } |
| |
| namespace { |
| // we should never have more than one stencil buffer with same combo of (width,height,samplecount) |
| void gen_cache_id(int width, int height, int sampleCnt, GrCacheID* cacheID) { |
| static const GrCacheID::Domain gStencilBufferDomain = GrCacheID::GenerateDomain(); |
| GrCacheID::Key key; |
| uint32_t* keyData = key.fData32; |
| keyData[0] = width; |
| keyData[1] = height; |
| keyData[2] = sampleCnt; |
| memset(keyData + 3, 0, sizeof(key) - 3 * sizeof(uint32_t)); |
| GR_STATIC_ASSERT(sizeof(key) >= 3 * sizeof(uint32_t)); |
| cacheID->reset(gStencilBufferDomain, key); |
| } |
| } |
| |
| GrResourceKey GrStencilBuffer::ComputeKey(int width, |
| int height, |
| int sampleCnt) { |
| // All SBs are created internally to attach to RTs so they all use the same domain. |
| static const GrResourceKey::ResourceType gStencilBufferResourceType = |
| GrResourceKey::GenerateResourceType(); |
| GrCacheID id; |
| gen_cache_id(width, height, sampleCnt, &id); |
| |
| // we don't use any flags for SBs currently. |
| return GrResourceKey(id, gStencilBufferResourceType, 0); |
| } |